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Search: id:A139205
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| A139205 |
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Numbers k such that (k!-10)/10 is prime. |
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+0
2
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| 5, 6, 7, 11, 13, 17, 28, 81, 87, 433, 640
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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a = {}; Do[If[PrimeQ[(n! - 10)/10], Print[a]; AppendTo[a, n]], {n, 1, 300}]; a (*Artur Jasinski*)
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CROSSREFS
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Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.
Sequence in context: A026309 A073936 A064615 this_sequence A039589 A028318 A154952
Adjacent sequences: A139202 A139203 A139204 this_sequence A139206 A139207 A139208
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KEYWORD
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hard,more,nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Apr 11 2008
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